一、引 言 由于埋沟电荷耦合器件(BCCD)具有高速、高传输效率、低噪声等优点而受到人们的重视.国际上已有人对BCCD的模型进行了研究.其中McKenna假定埋层完全耗尽和杂质分布均匀的情况下,求出一维的电势分布.但没有考虑信号电荷.Kent曾考虑过信号电荷,但由于假定埋层中杂质分布是线生的,因而不可能给出解析解.Lees则 I. INTRODUCTION Due to the advantages of high speed, high transmission efficiency and low noise, buried-charge coupled devices (BCCDs) have drawn much attention from people. The BCCD model has been studied internationally, in which McKenna assumes that the buried layers are completely depleted and In the case of uniform impurity distribution, one-dimensional potential distribution is obtained, but the signal charge is not taken into account. Theent considered the signal charge, but it is impossible to give an analytical solution because the impurity distribution in the buried layer is assumed to be lineal. then